drivers/input/joystick/spaceorb.c

   1 /*
   2  * $Id: spaceorb.c,v 1.15 2002/01/22 20:29:19 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  *
   6  *  Based on the work of:
   7  *      David Thompson
   8  */
   9
  10 /*
  11  * SpaceTec SpaceOrb 360 and Avenger 6dof controller driver for Linux
  12  */
  13
  14 /*
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  28  *
  29  *  Should you need to contact me, the author, you can do so either by
  30  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  31  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/slab.h>
  36 #include <linux/module.h>
  37 #include <linux/init.h>
  38 #include <linux/input.h>
  39 #include <linux/serio.h>
  40
  41 #define DRIVER_DESC     "SpaceTec SpaceOrb 360 and Avenger 6dof controller driver"
  42
  43 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  44 MODULE_DESCRIPTION(DRIVER_DESC);
  45 MODULE_LICENSE("GPL");
  46
  47 /*
  48  * Constants.
  49  */
  50
  51 #define SPACEORB_MAX_LENGTH     64
  52
  53 static int spaceorb_buttons[] = { BTN_TL, BTN_TR, BTN_Y, BTN_X, BTN_B, BTN_A };
  54 static int spaceorb_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ };
  55
  56 /*
  57  * Per-Orb data.
  58  */
  59
  60 struct spaceorb {
  61         struct input_dev *dev;
  62         int idx;
  63         unsigned char data[SPACEORB_MAX_LENGTH];
  64         char phys[32];
  65 };
  66
  67 static unsigned char spaceorb_xor[] = "SpaceWare";
  68
  69 static unsigned char *spaceorb_errors[] = { "EEPROM storing 0 failed", "Receive queue overflow", "Transmit queue timeout",
  70                 "Bad packet", "Power brown-out", "EEPROM checksum error", "Hardware fault" };
  71
  72 /*
  73  * spaceorb_process_packet() decodes packets the driver receives from the
  74  * SpaceOrb.
  75  */
  76
  77 static void spaceorb_process_packet(struct spaceorb *spaceorb, struct pt_regs *regs)
  78 {
  79         struct input_dev *dev = spaceorb->dev;
  80         unsigned char *data = spaceorb->data;
  81         unsigned char c = 0;
  82         int axes[6];
  83         int i;
  84
  85         if (spaceorb->idx < 2) return;
  86         for (i = 0; i < spaceorb->idx; i++) c ^= data[i];
  87         if (c) return;
  88
  89         input_regs(dev, regs);
  90
  91         switch (data[0]) {
  92
  93                 case 'R':                               /* Reset packet */
  94                         spaceorb->data[spaceorb->idx - 1] = 0;
  95                         for (i = 1; i < spaceorb->idx && spaceorb->data[i] == ' '; i++);
  96                         printk(KERN_INFO "input: %s [%s] is %s\n",
  97                                  dev->name, spaceorb->data + i, spaceorb->phys);
  98                         break;
  99
 100                 case 'D':                               /* Ball + button data */
 101                         if (spaceorb->idx != 12) return;
 102                         for (i = 0; i < 9; i++) spaceorb->data[i+2] ^= spaceorb_xor[i];
 103                         axes[0] = ( data[2]      << 3) | (data[ 3] >> 4);
 104                         axes[1] = ((data[3] & 0x0f) << 6) | (data[ 4] >> 1);
 105                         axes[2] = ((data[4] & 0x01) << 9) | (data[ 5] << 2) | (data[4] >> 5);
 106                         axes[3] = ((data[6] & 0x1f) << 5) | (data[ 7] >> 2);
 107                         axes[4] = ((data[7] & 0x03) << 8) | (data[ 8] << 1) | (data[7] >> 6);
 108                         axes[5] = ((data[9] & 0x3f) << 4) | (data[10] >> 3);
 109                         for (i = 0; i < 6; i++)
 110                                 input_report_abs(dev, spaceorb_axes[i], axes[i] - ((axes[i] & 0x200) ? 1024 : 0));
 111                         for (i = 0; i < 6; i++)
 112                                 input_report_key(dev, spaceorb_buttons[i], (data[1] >> i) & 1);
 113                         break;
 114
 115                 case 'K':                               /* Button data */
 116                         if (spaceorb->idx != 5) return;
 117                         for (i = 0; i < 6; i++)
 118                                 input_report_key(dev, spaceorb_buttons[i], (data[2] >> i) & 1);
 119
 120                         break;
 121
 122                 case 'E':                               /* Error packet */
 123                         if (spaceorb->idx != 4) return;
 124                         printk(KERN_ERR "spaceorb: Device error. [ ");
 125                         for (i = 0; i < 7; i++) if (data[1] & (1 << i)) printk("%s ", spaceorb_errors[i]);
 126                         printk("]\n");
 127                         break;
 128         }
 129
 130         input_sync(dev);
 131 }
 132
 133 static irqreturn_t spaceorb_interrupt(struct serio *serio,
 134                 unsigned char data, unsigned int flags, struct pt_regs *regs)
 135 {
 136         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 137
 138         if (~data & 0x80) {
 139                 if (spaceorb->idx) spaceorb_process_packet(spaceorb, regs);
 140                 spaceorb->idx = 0;
 141         }
 142         if (spaceorb->idx < SPACEORB_MAX_LENGTH)
 143                 spaceorb->data[spaceorb->idx++] = data & 0x7f;
 144         return IRQ_HANDLED;
 145 }
 146
 147 /*
 148  * spaceorb_disconnect() is the opposite of spaceorb_connect()
 149  */
 150
 151 static void spaceorb_disconnect(struct serio *serio)
 152 {
 153         struct spaceorb* spaceorb = serio_get_drvdata(serio);
 154
 155         serio_close(serio);
 156         serio_set_drvdata(serio, NULL);
 157         input_unregister_device(spaceorb->dev);
 158         kfree(spaceorb);
 159 }
 160
 161 /*
 162  * spaceorb_connect() is the routine that is called when someone adds a
 163  * new serio device that supports SpaceOrb/Avenger protocol and registers
 164  * it as an input device.
 165  */
 166
 167 static int spaceorb_connect(struct serio *serio, struct serio_driver *drv)
 168 {
 169         struct spaceorb *spaceorb;
 170         struct input_dev *input_dev;
 171         int err = -ENOMEM;
 172         int i;
 173
 174         spaceorb = kzalloc(sizeof(struct spaceorb), GFP_KERNEL);
 175         input_dev = input_allocate_device();
 176         if (!spaceorb || !input_dev)
 177                 goto fail;
 178
 179         spaceorb->dev = input_dev;
 180         snprintf(spaceorb->phys, sizeof(spaceorb->phys), "%s/input0", serio->phys);
 181
 182         input_dev->name = "SpaceTec SpaceOrb 360 / Avenger";
 183         input_dev->phys = spaceorb->phys;
 184         input_dev->id.bustype = BUS_RS232;
 185         input_dev->id.vendor = SERIO_SPACEORB;
 186         input_dev->id.product = 0x0001;
 187         input_dev->id.version = 0x0100;
 188         input_dev->cdev.dev = &serio->dev;
 189         input_dev->private = spaceorb;
 190
 191         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
 192
 193         for (i = 0; i < 6; i++)
 194                 set_bit(spaceorb_buttons[i], input_dev->keybit);
 195
 196         for (i = 0; i < 6; i++)
 197                 input_set_abs_params(input_dev, spaceorb_axes[i], -508, 508, 0, 0);
 198
 199         serio_set_drvdata(serio, spaceorb);
 200
 201         err = serio_open(serio, drv);
 202         if (err)
 203                 goto fail;
 204
 205         input_register_device(spaceorb->dev);
 206         return 0;
 207
 208  fail:  serio_set_drvdata(serio, NULL);
 209         input_free_device(input_dev);
 210         kfree(spaceorb);
 211         return err;
 212 }
 213
 214 /*
 215  * The serio driver structure.
 216  */
 217
 218 static struct serio_device_id spaceorb_serio_ids[] = {
 219         {
 220                 .type   = SERIO_RS232,
 221                 .proto  = SERIO_SPACEORB,
 222                 .id     = SERIO_ANY,
 223                 .extra  = SERIO_ANY,
 224         },
 225         { 0 }
 226 };
 227
 228 MODULE_DEVICE_TABLE(serio, spaceorb_serio_ids);
 229
 230 static struct serio_driver spaceorb_drv = {
 231         .driver         = {
 232                 .name   = "spaceorb",
 233         },
 234         .description    = DRIVER_DESC,
 235         .id_table       = spaceorb_serio_ids,
 236         .interrupt      = spaceorb_interrupt,
 237         .connect        = spaceorb_connect,
 238         .disconnect     = spaceorb_disconnect,
 239 };
 240
 241 /*
 242  * The functions for inserting/removing us as a module.
 243  */
 244
 245 static int __init spaceorb_init(void)
 246 {
 247         serio_register_driver(&spaceorb_drv);
 248         return 0;
 249 }
 250
 251 static void __exit spaceorb_exit(void)
 252 {
 253         serio_unregister_driver(&spaceorb_drv);
 254 }
 255
 256 module_init(spaceorb_init);
 257 module_exit(spaceorb_exit);